The activated clay is the best decolourization reagent to the crude product, and 95% methanol is the best solvent for recrystallization. The 4 MDBT with 96.1% in purity and 61.6% in yield was obtained.
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释义
粗产品经活性白土脱色及在 - 2 0℃下用 95%25甲醇重结晶 2次后 ;产品纯度达 96 .;1%25;产率为6 1 6%25。
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